Back to EveryPatent.com
United States Patent | 5,594,271 |
Iwata ,   et al. | * January 14, 1997 |
A bipolar transistor of the multi-emitter type which is provided with a large number of emitter diffusion layers formed in the two-dimensionally arranged state on a base diffusion layer of a substrate, a large number of emitter electrode films formed respectively correspondingly on the emitter diffusion layers, a base electrode film formed on the base diffusion layer, and a collector electrode film formed on the substrate, and the transistor is further provided with a wiring film commonly connected to the large number of emitter electrode films except at least one of the emitter electrode films.
Inventors: | Iwata; Hitoshi (Aichi, JP); Jinkai; Koichi (Aichi, JP); Imaeda; Yasuo (Aichi, JP) |
Assignee: | Kabushiki Kaisha Tokai Rika Denki Seisakusho (Aichi, JP) |
[*] Notice: | The portion of the term of this patent subsequent to March 22, 2011 has been disclaimed. |
Appl. No.: | 354085 |
Filed: | December 6, 1994 |
Mar 02, 1988[JP] | 63-49427 |
Current U.S. Class: | 257/469; 257/565; 257/566; 257/579; 257/E29.026; 257/E29.032 |
Intern'l Class: | H01L 029/72; H01L 027/102 |
Field of Search: | 257/48,560-566,557,579,575,414,467,469,470 |
3576476 | Apr., 1971 | Kerr | 317/235. |
3582723 | Jun., 1971 | Kerr | 317/235. |
3651510 | Mar., 1972 | Gilbert | 340/324. |
3746949 | Jul., 1973 | Nienhuis et al. | 317/235. |
3922706 | Nov., 1975 | Kaiser | 357/36. |
3946425 | Mar., 1976 | Shoji et al. | 357/64. |
4049975 | Sep., 1977 | Colaco | 257/563. |
4054897 | Oct., 1977 | Fukuda | 357/36. |
4104785 | Aug., 1978 | Shiba et al. | 29/574. |
4231059 | Oct., 1980 | Hower et al. | 357/68. |
4306246 | Dec., 1981 | Davies et al. | 357/36. |
4513306 | Apr., 1985 | Davies | 357/36. |
4586072 | Apr., 1986 | Nakatani et al. | 357/34. |
4656496 | Apr., 1987 | Widlar | 357/36. |
4680608 | Jul., 1987 | Tsuzuki et al. | 357/36. |
4783690 | Nov., 1988 | Walden et al. | 357/23. |
4792839 | Dec., 1988 | Strack et al. | 357/38. |
4831281 | May., 1989 | Miller | 307/299. |
5296732 | Mar., 1994 | Iwata et al. | 257/565. |
Foreign Patent Documents | |||
130465 | Aug., 1982 | JP. | |
181160 | Nov., 1982 | JP | 357/68. |
215772 | Dec., 1984 | JP. | |
177775 | Aug., 1986 | JP. | |
251657 | Oct., 1989 | JP. |